Improvement in drills for well-boring



UNITED STATES.

PATENT OFFICE.

O. B. LATHAM, OF SENECA FALLS, NEW YORK.

Specifieation forming part of Letters Patent No. 49,123, dated August1865.

To all whom it may cancer.-

Be it known that I, O. B. LATHAM, of Seneca Falls, in the county ofSeneca and State of New York, have invented certain new and usefulImprovements in a Oombined Drill and Reamer for Sinkin g Wells, Sro.,and I do hereby declare that the following is afull and completedescription of the construction andoperation of the same, referencebeing had to the accompanying drawings, making apart ef thisspecification, in which Figure 1 is a perspective view of the reamer anddrill combined. Fig. 2 is a Vertical section of the same. Fig. 3represents detached parts th at will bereferred to in the description.

Similar letters of reference (lenote like parts in the views.

My improvement relates to a reamer and drill combined in one tool,whereby the well is drilled and ream ed out at the same time with oneoperation.

In Figs. 1 and 2, A represents the drill, which may be of'lhe usualform, The shank B of the reamer and drill is enlarged at B', throughwhich there is a slot that the reainer O is secured in by means of akey,D, and glbs F. The manner in which the reamer, gibs, and key are formedand secured in place is shown in Figs. 2 and 3, Fig. 3 being aperspective view of each of them detached from the drill and from eachother, the dotted lines indicating the manner in which they coinetogether. i

The reameris made in two partsor sections, d d, between which one ormore thih metallic plates can be placed, as seen at c, whereby thereamer can be expanded or contracted to cut a wide or narrow opening, asmay be (lesired. The sections and plates are held together by a screw,e, through the center, as represent-ed. The reamer is pointed at thelower end in the center, the inclined sides or planes e' fitting downinto the shank, which is beveled out in a similar manner, forming adovetail. The lower edges, Z) b, of the sides of the reamer that projectoutside of the shank (formed as represented) are the cutting-edges. Thereamer is inclined upward toward the center at the top, that the gibs F,being of the same shape on theunder side, fit down on. The reamer, beingthus formed above and below, When adjusted'into place, is held securelyand immovably in the shank.

The gibs F, of which' there can be one or more, fittin g down on thereamer, are formed with a head, F', on each end that projects out.:`` ii, on each side of the slot, which,,together with the reamer, beinginclined `upward,prevents i any lateral movement of the gibs and holds ithe upper end of the reame'r as firm as the lower end. The key D,tapering toward one end, when driven in above the gibs,retaius thereainer firmly in place. By removing the key and taking outor slippingup the gibs the i reamer can readil y be removcd from the shank for thepurpose of adjustin g it,making it wider or narro wer, as may bedesired, or for any othern object. l i

The reamer, in place of being secured iu the i shank by gibs and a key,can be fastened by means of a set-screw.

On the top of the shank B, at E, is screwed the drill'shaft, whereby thedrill and reamer are i operated. i

In using this drill and reamer, asthe well is bored out by the drillbeing turned round and V i round, the reamer, turningin the same manner,

as herein described, the reamer, being above i the drill in the well,retains the drill in a direetly Vertical position, whatever may be thedirection of the crcvice.

It is found in practice thatthe cutting=edges i b of the reamer areself-sharpening.

What Iclaim as my improvement, and desire to secure by Letters Patent,isi The adj ustable reamer U, in two Sections, the scr`ew e, plates a,the key, and gibs, iu combination with the drill and sha-nk, arrangedand Operating conjointly, substantially as and for the purpose sett'orth.` j l v o. B.. LATHAM. Witnesses W. H. BURRIDGE, A. W. MCOLELLAN.

